To play the F7 chord, place the middle finger on the 2nd fret of the top g-string, ring finger on the 3rd fret of the C-string, index finger on the 1st fret of the E-string, and little finger on the 3rd fret of the bottom A-string.
F7 Ukulele Chord Explanation
The F7 chord contains the notes F-A-C-Eb.
To build an F7 chord, take the dominant seventh formula (1-3-5-b7) and apply it to the F major scale (F, G, A, Bb, C, D, E).
Identify the first, third, fifth, and flat seventh scale degrees in the F major scale which are F-A-C-Eb.
Notice how the seventh scale degree found in the chord is lowered a half step as indicated by the "flat" or "b" that precedes the number "b7". In this case, the seventh scale degree of an F major scale – a "E" note is lowered a half step to an "Eb" note to make the chord a dominant seventh chord.
Watch the following video to learn how to play an F7 chord on ukulele.